21_1/4x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films Average Rated Life Hours: 50000

Average Rated Life Hours: 50000 FCC_Registration: yes Frequency: 50/60 Rated Wattage: YES W ROHS_Registration: yes Weight (Unboxed): 24

No fans No noise LED Grow System design will make your growing life easy and quiet

They reliably warm the root zone to 10ºF-20ºF above ambient air temperature

Six brackets and hardware

21_1/4x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Reflective & Greenhouse Films Average Rated Life Hours: 50000Nordic Pure Custom MERV 8 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition